<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 角色添加按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="roleslist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <!-- eslint-disable-next-line -->
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
            {{scope.row}}
          </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <!-- eslint-disable-next-line -->
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
    <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defkeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      roleslist: [],
      //控制分配权限的对话框的显示与隐藏
      setRightDialogVisible:false,
      //所有权限的数据
      rightslist:[],
      //树形控件的属性绑定对象
      treeProps:{
        label:"authName",
        children:'children'
      },
      //默认选中的节点ID值数组
      defkeys:[],
      //当前即将分配权限的角色Id
      roleId:''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    //获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }

      this.roleslist = res.data

      console.log(this.roleslist)
    },
    //根据ID删除对应的权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除!')
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败!')
      }

      //this.getRolesList()
      role.children = res.data
    },
    //展示分配权限的对话框
   async showSetRightDialog(role){
     this.roleId =role.id
      //获取所有权限的数据
    const {data:res} = await this.$http.get('rights/tree')

    if(res.meta.status !== 200){
      return this.$message.error('获取权限数据失败!')
    }
    //把获取到的权限数据保存到data中
      this.rightslist =res.data
      console.log(this.rightslist)

      //递归获取三级节点的Id
      this.getLeafkeys(role,this.defkeys)

      this.setRightDialogVisible =true
    },
    //通过递归的形式，获取角色下三级权限的Id
    getLeafkeys(node,arr){
      //如果当前，node 节点不包含children属性，则是三级节点
      if(!node.children){
        return arr.push(node.id)
      }

      node.children.forEach(item =>{
        this.getLeafkeys(item,arr)
      })
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed(){
      this.defkeys = []
    },
    //点击为角色分配权限
   async allotRights(){
      const keys =[
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      console.log(keys)
      const idStr =keys.join(',')

      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if(res.meta.status !== 200){
        return this.$message.error('分配权限失败！')
      }
      this.$message.success("分配权限成功！")
      this.getRolesList()
      this.setRightDialogVisible =false
    }
  },
}
</script>

<style lang="less" scpoed>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>